When you shop for a hair serum, the ingredient list can feel like a chemistry exam. In this guide we break down the five key ingredients printed on every box of E&H ExtraHair Hair Care Serum — and why each one is a popular choice in scalp and hair care.

1. Saw Palmetto

Saw palmetto is a botanical extract from the berries of a small palm native to the southeastern United States. It has a long history in traditional wellness and has become one of the most talked-about plant extracts in modern scalp care products. In a serum, it is used as part of a botanical blend designed to care for the scalp environment.

2. Panthenol (Pro-Vitamin B5)

Panthenol is a form of vitamin B5 that is widely used in shampoos and conditioners. It is valued for its moisturizing properties — it helps hair strands hold on to water, which can leave hair feeling softer, smoother and easier to manage.

3. Caffeine

Yes, the same molecule that wakes you up in the morning! Caffeine has become a favorite in scalp-care formulas, and you will find it in many hair tonics and serums around the world. Applied with a gentle scalp massage, it is part of a refreshing daily routine.

4. Keratin

Keratin is the structural protein that hair is actually made of. Hair care products use keratin to help reinforce the surface of the hair strand, which can make hair look smoother and feel stronger, especially if it is dry or damaged from heat styling.

5. Biotin (Vitamin B7)

Biotin is one of the best-known “hair vitamins.” In topical products it is included as a conditioning ingredient that supports the look and feel of healthy hair.

Why a Combined Formula?

Each ingredient plays a different role — botanical care, moisture, refreshment and strand-strengthening — so a formula that combines them lets you cover several steps of your routine with one product. E&H ExtraHair is a lightweight, unisex serum suitable for all hair types, and it comes in a 50 ml dropper bottle that makes it easy to apply directly onto the scalp.

How to Get the Most From Your Serum

• Be consistent: use it twice a day, morning and evening.
• Start with a clean, dry scalp so the serum can reach the skin.
• Massage for 5–6 minutes after applying with the dropper.
• Patch test first if you have sensitive skin, and always check the full ingredient list on the box.

Read our step-by-step guide: How to build a morning & evening scalp care routine.

Where to Buy

Herevya ships authentic E&H ExtraHair, made in Türkiye, from our New York warehouse. Choose a single 50 ml bottle, save with the 2-Pack or 3-Pack, or get the complete 3-Pack + Scalp Roller set.

Free U.S. shipping on orders of $79+, import duties included, and 15-day returns on unopened items.

E&H ExtraHair is a cosmetic hair care product. It is not intended to diagnose, treat, cure, or prevent any disease, and individual results vary. If you have concerns about hair loss or your scalp, please talk to a healthcare professional.